Invention Grant
- Patent Title: High capacity memory system with improved command-address and chip-select signaling mode
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Application No.: US15101870Application Date: 2014-12-18
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Publication No.: US10223299B2Publication Date: 2019-03-05
- Inventor: Frederick A. Ware , Abhijit Abhyankar , Suresh Rajan
- Applicant: RAMBUS INC.
- Applicant Address: US CA Sunnyvale
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Lowenstein Sandler LLP
- International Application: PCT/US2014/071311 WO 20141218
- International Announcement: WO2015/095612 WO 20150625
- Main IPC: G06F13/16
- IPC: G06F13/16 ; G06F11/20 ; G06F13/00 ; G06F13/42

Abstract:
A memory controller and buffers on memory modules each operate in two modes, depending on the type of mother-board through which the controller and modules are connected. In a first mode, the controller transmits decoded chip-select signals independently to each module, and the motherboard data channel uses multi-drop connections to each module. In a second mode, the motherboard has point-to-point data channel and command address connections to each of the memory modules, and the controller transmits a fully encoded chip-select signal group to each module. The buffers operate modally to correctly select ranks or partial ranks of memory devices on one or more modules for each transaction, depending on the mode.
Public/Granted literature
- US20160314085A1 HIGH CAPACITY MEMORY SYSTEM WITH IMPROVED COMMAND-ADDRESS AND CHIP-SELECT SIGNALING MODE Public/Granted day:2016-10-27
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